Massive stars exploding in a He-rich circumstellar medium $-$ X. Flash spectral features in the Type Ibn SN 2019cj and observations of SN 2018jmt

Abstract

We present optical and near-infrared observations of two Type Ibn supernovae (SNe), SN 2018jmt and SN 2019cj. Their light curves have rise times of about 10 days, reaching an absolute peak magnitude of $M_g$(SN 2018jmt) = $-$19.07 $\pm$ 0.37 and $M_V$(SN 2019cj) = $-$18.94 $\pm$ 0.19 mag, respectively. The early-time spectra of SN 2018jmt are dominated by a blue continuum, accompanied by narrow (600$-$1000 km~s${}^{-1}$) He I lines with P-Cygni profile. At later epochs, the spectra become more similar to those of the prototypical SN Ibn 2006jc. At early phases, the spectra of SN 2019cj show flash ionisation emission lines of C III, N III and He II superposed on a blue continuum. These features disappear after a few days, and then the spectra of SN 2019cj evolve similarly to those of SN 2018jmt. The spectra indicate that the two SNe exploded within a He-rich circumstellar medium (CSM) lost by the progenitors a short time before the explosion. We model the light curves of the two SNe Ibn to constrain the progenitor and the explosion parameters. The ejecta masses are consistent with either that expected for a canonical SN Ib ($\sim$ 2 M${}_{\odot }$) or those from a massive WR star ($>$ $\sim$ 4 M${}_{\odot }$), with the kinetic energy on the order of $10^{51}$ erg. The lower limit on the ejecta mass ($>$ $\sim$ 2 M${}_{\odot }$) argues against a scenario involving a relatively low-mass progenitor (e.g., $M_{ZAMS}$ $\sim$ 10 M${}_{\odot }$). We set a conservative upper limit of $\sim$0.1 M${}_{\odot }$ for the ${}^{56}$Ni masses in both SNe. From the light curve modelling, we determine a two-zone CSM distribution, with an inner, flat CSM component, and an outer CSM with a steeper density profile. The physical properties of SN 2018jmt and SN 2019cj are consistent with those expected from the core collapse of relatively massive, stripped-envelope (SE) stars.

28 pages, 19 figures, Accepted for publication in Astronomy & Astrophysics

References in corpus (100)

• The chemical composition of the Sun
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• The Transiting Exoplanet Survey Satellite
• How Massive Single Stars End their Life
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• ATLAS: A High-Cadence All-Sky Survey System
• Las Cumbres Observatory Global Telescope Network
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• Pre-Supernova Evolution of Massive Single and Binary Stars
• WISeREP - An Interactive Supernova Data Repository
• Pulsational Pair-Instability Supernovae
• Pulsational pair instability as an explanation for the most luminous supernovae
• The HST Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on the Hubble Constant
• Hydrogen-poor superluminous stellar explosions
• The First Systematic Study of Type Ibc Supernova Multi-band Light Curves
• A giant outburst two years before the core-collapse of a massive star
• Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries
• GROND - a 7-channel imager
• A Wolf-Rayet-like progenitor of supernova SN 2013cu from spectral observations of a wind
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• Design and operation of the ATLAS Transient Science Server
• A faint type of supernova from a white dwarf with a helium-rich companion
• Bolometric light curves and explosion parameters of 38 stripped-envelope core-collapse supernovae
• Oxygen and nitrogen abundances in nearby galaxies. Correlations between oxygen abundance and macroscopic properties
• The Zwicky Transient Facility Bright Transient Survey. II. A Public Statistical Sample for Exploring Supernova Demographics
• The 2175 A dust feature in a Gamma Ray Burst afterglow at redshift 2.45
• Pre-Supernova Outbursts via Wave Heating in Massive Stars I: Red Supergiants
• The Unique Type Ib Supernova 2005bf at Nebular Phases: A Possible Birth Event of A Strongly Magnetized Neutron Star
• Massive stars exploding in a He-rich circumstellar medium. I. Type Ibn (SN 2006jc-like) events
• Dust Formation and He II 4686 emission in the Dense Shell of the Peculiar Type Ib Supernova 2006jc
• A low energy core-collapse supernova without a hydrogen envelope
• Underluminous Type II Plateau Supernovae: II. Pointing towards moderate mass precursors
• Multi-wavelength Observations of the Enduring Type IIn Supernovae 2005ip and 2006jd
• Interacting Supernovae: Types IIn and Ibn
• The ASAS-SN Catalog of Variable Stars III: Variables in the Southern TESS Continuous Viewing Zone
• Observational and Physical Classification of Supernovae
• Extensive optical and near-infrared observations of the nearby, narrow-lined type Ic SN 2007gr: days 5 to 415
• Optical and Ultraviolet Spectroscopy of SN 1995N: Evidence for Strong Circumstellar Interaction
• Rapidly Decaying Supernova 2010X: A Candidate ".Ia" Explosion
• Fallback Supernovae: A Possible Origin of Peculiar Supernovae with Extremely Low Explosion Energies
• An Analytic Bolometric Light Curve Model of Interaction-Powered Supernovae and its Application to Type IIn Supernovae
• A Spitzer Survey for Dust in Type IIn Supernovae
• An Unusually Fast-Evolving Supernova
• Type Ibn Supernovae Show Photometric Homogeneity and Spectral Diversity at Maximum Light
• Massive stars exploding in a He-rich circumstellar medium III. SN 2006jc: IR echoes from new and old dust in the progenitor CSM
• Bright, months-long stellar outbursts announce the explosion of interaction-powered supernovae
• Pre-Supernova Outbursts via Wave Heating in Massive Stars II: Hydrogen-poor Stars
• A WC/WO star exploding within an expanding carbon-oxygen-neon nebula
• Massive stars exploding in a He-rich circumstellar medium. II. The transitional case of SN 2005la
• The prevalence and influence of circumstellar material around hydrogen-rich supernova progenitors
• Helium Emission in the Type Ic SN 1999cq
• Early Spectroscopy and Dense Circumstellar Medium Interaction in SN 2023ixf
• The Type Icn SN 2021csp: Implications for the Origins of the Fastest Supernovae and the Fates of Wolf-Rayet Stars
• Massive stars exploding in a He-rich circumstellar medium. IV. Transitional Type Ibn Supernovae
• Metallicity at the explosion sites of interacting transients
• Massive stars exploding in a He-rich circumstellar medium - IX. SN 2014av, and characterization of Type Ibn SNe
• SN 2011hw: Helium-Rich Circumstellar Gas and the Luminous Blue Variable to Wolf-Rayet Transition in Supernova Progenitors
• Integral field spectroscopy of supernova explosion sites: constraining mass and metallicity of the progenitors - I. Type Ib and Ic supernovae
• The MASTER-II Network of Robotic Optical Telescopes. First Results
• PS1-12sk is a Peculiar Supernova From a He-rich Progenitor System in a Brightest Cluster Galaxy Environment
• Properties of Type Ibn Supernovae: Implications for the Progenitor Evolution and the Origin of a Population of Rapid Transients
• SN 2017ens: The Metamorphosis of a Luminous Broad-lined Type Ic Supernova into an SN IIn
• Circumstellar interaction in type Ibn supernovae and SN 2006jc
• SN 2015U: A Rapidly Evolving and Luminous Type Ibn Supernova
• The Diverse Properties of Type Icn Supernovae Point to Multiple Progenitor Channels
• Type Ibn Supernovae May not all Come from Massive Stars
• Origins of Type Ibn SNe 2006jc/2015G in interacting binaries and implications for pre-SN eruptions
• An Emerging Class of Bright, Fast-evolving Supernovae with Low-mass Ejecta
• Massive stars exploding in a He-rich circumstellar medium. V. Observations of the slow-evolving SN Ibn OGLE-2012-SN-006
• The Nearby Type Ibn Supernova 2015G: Signatures of Asymmetry and Progenitor Constraints
• The possible detection of a binary companion to a Type Ibn supernova progenitor
• Optical photometry and spectroscopy of the type Ibn supernova SN 2006jc until the onset of dust formation
• Massive stars exploding in a He-rich circumstellar medium. VI. Observations of two distant Type Ibn supernova candidates discovered by La Silla-QUEST
• iPTF13beo: The Double-Peaked Light Curve of a Type Ibn Supernova Discovered Shortly after Explosion
• Near-Infrared observations of the type Ib Supernova SN2006jc: evidence of interactions with dust
• High-Cadence, Early-Time Observations of Core-Collapse Supernovae From the TESS Prime Mission
• Circumstellar Material Ejected Violently by A Massive Star Immediately before its Death
• Stripped-envelope core-collapse supernova ${}^{56}$Ni masses: Persistently larger values than supernovae type II
• Flash ionization signatures in the type Ibn supernova SN 2019uo
• The luminous and rapidly evolving SN 2018bcc: Clues toward the origin of Type Ibn SNe from the Zwicky Transient Facility
• Massive stars exploding in a He-rich circumstellar medium - VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal Type Ib Supernova
• OGLE-2014-SN-131: A long-rising Type Ibn supernova from a massive progenitor
• New solar metallicity measurements
• SN 2018gjx reveals that some SNe Ibn are SNe IIb exploding in dense circumstellar material
• Will a Black Hole Soon Emerge from SN 1997D ?
• Massive stars exploding in a He-rich circumstellar medium - VIII. PSN J07285387+3349106, a highly reddened supernova Ibn
• LSQ13ddu: A rapidly-evolving stripped-envelope supernova with early circumstellar interaction signatures
• SN 2020bqj: a Type Ibn supernova with a long lasting peak plateau
• Spectroscopic observations of progenitor activity 100 days before a Type Ibn supernova
• SN 2021foa, a transitional event between a Type IIn (SN 2009ip-like) and a Type Ibn supernova
• The Highly Luminous Type Ibn Supernova ASASSN-14ms
• Photometry and spectroscopy of the Type Icn supernova 2021ckj: The diverse properties of the ejecta and circumstellar matter of Type Icn SNe
• Exploring the Energy Sources Powering the Light Curve of the Type Ibn Supernova PS15dpn and the Mass-Loss History of the SN Progenitor
• The Type Ibn Supernova 2019kbj -- Indications for Diversity in Type Ibn Supernova Progenitors
• Are stripped envelope supernovae really deficient in ${}^{56}$Ni?
• Evolution of A Peculiar Type Ibn Supernova SN 2019wep
• Optical and UV Spectra of the Remnant of SN 1885 (S And) in M31
• The Study of Dust Formation of Four Type Ibn Supernovae
• ASASSN-14ms:the Most Energetic Known Explosion of a Type Ibn Supernova and its Physical Origin

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